समुद्री विज्ञान: अनुसंधान एवं विकास

अमूर्त

Explaining Various Types of Fish-Attracting Device

Sujatha Kollanki, Sushmitha Podapati

A fish aggregating (or aggregation) device (FAD) is a man-made object that are used to attract ocean-going pelagic fish such as marlin, tuna, mahi-mahi (dolphin fish). They usually consist of the buoys or floats tethered to the ocean floor with concrete slabs. FADs attract the fish for numerous reasons that vary by the species. Fish move gracefully through the water. They use their powerful tails to push them forward in the water and their fins to steer. Many of the fishes are in live and swim with the large groups called schools. Traveling in a school helps to protect them from predators. Fish advances to swim in schools to better shelter themselves from predators, to improve their foraging and to swim more efficiently. Unlike shoaling, in which the fish merely swim loosely together, schooling essentials to coordinated body positions and integrated activity.